Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0a223d6f38e3c4eec89e49570bea56c9a178c771be9da7a2cc1dcc3296d898a' 
  AND token = 'O/2XmKIX4USijaAcUbWeFtCKGzoyRlYRgy0E3uCBu6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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