Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '303d1db63c1542cccf25064c3ea58172e9c5b37f75d112af3737fe36b75f5fd6' 
  AND token = 'tQTQCnWOffZCEvPnH8s/lm7hvzZhXR/0eg2co8Ih5h0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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