Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4dcefbf4e3e78ff61e8bff605ca0e536865d9e7afffeb7c5e763f81e52949c82' 
  AND token = '4GQH6/qUWadShMpeDx0ZSXM9wVIEiEtikQGxkFR/RGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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