Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fcf3d526bbc6fa683de78962c638d09c2afe382f47bc714b06072ac68c5311c' 
  AND token = '02dqX1khysDxsbq37fpXvI3ZzG1oF8ODyxiOV9F9jtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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