Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ae4c4570fdc9a4799e0eb3bdc7e39a6543266dd14d109d4f88d56dcf81c8990' 
  AND token = '2tyRa0mRQESHRK9E+H2DDts80FevOavJv0nvFvLRl2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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