Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2342294e22fd02d1d9c8477c5788cbf69e5e554a7920ec24f50e4013bd731a3f' 
  AND token = 'sHeW8PWsVko3cL/Rz8hLmelSOIsL29tQFuuV4sOIR/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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