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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4883918acb8f54bf44460dd88dd64de6f569ed156ce994380b6057449c50705e' 
  AND token = 'D+xMN2sd6k24oQ4bTa5kgWl+aMFkgZNRV/tLjfsJ3UE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}