Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5de4cbe0dbcf211cb1d811bb0152b57c46ef47b88eb38a5bb285b0e300466ccf' 
  AND token = '78mLTOJbWBGHEfirnY0Zg6Fswpui7J38WujqSQ8rY6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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