Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17fcf1c904c5a1bac05e05802ec54f9abc7c41c30331301a243dcc3bfbc29669' 
  AND token = 'YgXKZQ3gxvR0FwKHCzRC/RMIXzF5KBFn0aNglMRqeNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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