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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca1c07df9fd485cc3f34df8bbf910899dfe83653bd067c498dbc92b987312896' 
  AND token = 'y91p64moXNnYq9Cnza68cgQI5xKmu5AerXbG0XGSFGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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