Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a00f61c8c2c702733ffe29a7bd6a802cde6d75f280c5f539feb35943528d91bb' 
  AND token = 'MqQA1B6P25nXEgQph62BhG6cFDPiDJiAKJ6t+BfRJJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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