Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d700c1c51c90cf74bb867f25be0f6085949a3516dc099433ac4b55230e68414' 
  AND token = 'oNuj8b8zCz0ouoMNLflW0+f4Tom50uFwZbHFww5TAI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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