Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '737c22f9bef26badedd418d6c01ca6a8097a37e18bcd80a25b9929345d9cc502' 
  AND token = 'Vt12FrM68UwHvJDfoRghPaLUXa5YuvETtPPW8g0xjLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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