Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af55a962b22369d27e668afa638f911e5a6da14ede94997336428326b0f8a0cf' 
  AND token = 'IQ7QHheHr1FpdK6ETIsQ3F6bK/1ZGakjGOa1wFxSfeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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