Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cebe771f45a276e3bfaf950353f057ca89517832c6659d4774a85a5c23aaa56d' 
  AND token = 'qK8B722zc+GeP4GE5y38jeZZMF9ST4IsHXLFvxN8hdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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