Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4035ca74dafe4e55e599fa97c89b22d9274e5eb241b04add68779821e45901a' 
  AND token = 'E6rY6rUiKZ6Oziunz1DceCkftfL8HgTqxs2Js+V5GMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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