Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cdfbeb7ec372914499d37bbe9acaf171ba483f5f7b428b4aa1f9adea3e733d63' 
  AND token = 'K7HppdbjDybg46OkjuekHjm651jfOoQ+S3uHbNQT2c4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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