Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2cd203d3e77c70b587a845fa0f73dce39220e4738b43945383123928ae785fe' 
  AND token = 'dhEu+4dJcyPj8dXCeq+fGBwowwRPiYsbp+TgfWN5UUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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