Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f3acf713e07c15777d6d08df9faacf8a89b076fea48d3e6008c10b78e7390d9' 
  AND token = 'q2XYa055taxYzlyO3aw2JWnIRcE237Dt+f/3W8mVhsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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