Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc3f61ee656cc7349755e7e20d1aad765ba6aacaadd66561d209dc6f31c2ca35' 
  AND token = 'Opl6S6ah9c4AAoXa7jIw7ifAExnx3/CiSmYwxlQdAx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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