Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a3b043c9945f5c0e0d756ba0251a12c43ee38f9703c88a6d05b1dad7ea34f30' 
  AND token = 'mOe1ZfVs3HOJH/NIo2OJsrDYH4iJgQ8b4lR9baKlH0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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