Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc54292bb4c1ec25c89557c7dfe914f6d9800018f302c5ae1d80945ee4f0ce08' 
  AND token = '7SBAORgz1bB3/9l49lYnTadAlT9TEe+gB9aQ9QaCyKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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