Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b66de5b2723ab372503fb58a30c25fedca38fe22f50d1151aa2416bb7d67de1' 
  AND token = 'JFT4wuCDuxE1XG8/t9V6kUZdFOWlYRr4StCwrFdKORo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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