Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0452aa7700f429b9cb6391309d60e1496249a16e96fe003dede132bc41a7010c' 
  AND token = '3ws+ZLJTunh7BsFWnRefHSex9bRcOkloYtLNao4OyNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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