Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b7168b1fe42a91168d561ec44f92ed1d29c1b8f0dfe86ca4ce0f6c2b20e3b15' 
  AND token = 'woBAEqsqUA00YTqAFTqwfzCyKRdgxQj67QEaJ0j1ywc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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