Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd663dc830b76781e3119b418bfbb97ff4cb790f9548967c34cc02f2be3d181c5' 
  AND token = 'HDFktWxz4cQN1FcsOl+2hjsKkFpZYjIJ14Lqe6PUn0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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