Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba24cccb6790fbf69e8bfe4a7846dc5748ce0b401800a4c7ed827d55bf56511c' 
  AND token = 'kNBoZF9FlqHfsgEfb3nVUnzFzFXYbyGbWY2dKka8XnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}