Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffc59ecb1d1793500842d91cf96eb09e7b7ac75ab6609100ca613b53e2406300' 
  AND token = 'SILbL1RA3n1jcExz9yertEFw9nryv+eSPJifbecqKpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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