Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd1ad328747ca0ac1e6367e08027b9c0809057591455cd68af057c7bae5be1d8' 
  AND token = 'OktffyX1/kfuZjUGyo4c8SduBLJeTp9NVVO+oGqMRpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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