Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0509dfadfcb7291e78641642336b8f120975703abdbb4e73b0374e0b94d65229' 
  AND token = 'W8aIWDpMhcDAIrZcrUIpmaBB19S/OGdJG7bik7Ts21k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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