Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e270e483265ed0fa1235fadcb7d89860ca0d95390f1e28088cf1b4223fff373e' 
  AND token = 'z2IFUhxNTzzcSt4rTKSU3vbjGaXuY2mhWFuPYE7et4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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