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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bb40057aca1b4ba5f9f7aba72f345372196e349b541948a63cbf68dcd30541c' 
  AND token = 'aaNVKh59a1RarqXnFl/lk6hxSyibQREOdZ4zlqDkIfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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