Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1791ffeffc6dd8e0aa93adc4a76adcebe2a41614fe450b1284419e62ccea17f0' 
  AND token = 'fAoKdceFN9L504fXws7u1UwVf14mHPe2weRHnzWOfQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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