Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd64e19436c72eddcd41e7788169645e30375d04e0f17d9f19f799d814a75fb54' 
  AND token = 'p1Nr6n3XnlKWOrQFIBW360fppnlw/v2vid5NuHCRLm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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