Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91b560d44354df11ec609017ca2a137b88b7853a7a7d26c8e7347a744546fbf5' 
  AND token = '1KCqcEM6KFu5GEYJGO9oAPC7LqXYduTGsEghP4QjWNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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