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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95689c57a7194eb8a5ba8a5cb201d0619a93a570735a267fbd04220e7987d654' 
  AND token = 'DxmnZgonPMdB/8CZ685zb9JhocrPEVwZFrE4iMC3qNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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