Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3468cd1058a9a2d0752d4390618d42c4234f000115d36f88cba2816646dd6693' 
  AND token = '9s1ctlp1TwnItQC36+5CJVL9cJjess2IDKGiDhndu6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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