Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ad55fa2dcb134fc1c1584a73b22b7dce042b6f2246657c44b51e960e769e654' 
  AND token = 'Br6rfc80BnAh/4SXAhhLL59ONgbSiQ5no9xWprFTHGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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