Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6c09ad00fcb5e66b9c32734be8701176f963f0cd7d80c474f81af461a492ec6' 
  AND token = 'Z6PTwis1O0dvGHd5XWY6agRpEHr0g4w/Bt7wPxU1Chc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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