Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a551583eb51da469e45c9e4afe0dc492507f4e4c51859fe987cb7e7753f9d296' 
  AND token = 'zPgJ0RDTu6w+a5P+UwgSlpRHXihr01P9Bu03qdSNwCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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