Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '786f7408549d786e30a001aa4315802e716fdcf3a3fdf58670ca3765b6a40168' 
  AND token = 'qThlhXMan/TP9+85qKqLSJjzVKsFNWmpUcW4U4xja5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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