SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '144de0831400656f97cbc1a27c97f361ffcb4d45873b6805b354782718394d2d' 
  AND token = 'yLBlNQkWCSmjuO+GOpedzN067skf53Zrptr8Azg3hpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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