Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42ae2b79289f923d635be438d6242da9de800d99248737198fe85830add5fb8c' 
  AND token = 'nduk78X7fdSWLRIO0Tfq+2QEF2GYssP5AhtMq8XcOJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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