Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1eb9e8a4a4015d21b0ce2773f467de848fcdb25d66650be0f44c5db200670d5' 
  AND token = '40CPZdBLeRA+xV1KeS3ZLXRaW0JGn2LEzHSBJ5824/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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