Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '735213a3adef532741e202722ce6f01d025da3149a4e77348855e6df7d73f990' 
  AND token = 'ipaCMjfV2SZI3dT7EWVKTG5xO1IjQ+3NO13CA8+vi9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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