Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ada30c70147c06c5cb99419aa43ba1111e376bb8de5e7816ac7937023b45d4a1' 
  AND token = '4ah5YYyk33pEkyiYYFSiXP30x8UxF21BuOx8asK167Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}