Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdac49158c2818a3f771c07dd72dfb3aa0dc59541e602582daa2e353b33303ec' 
  AND token = '619/PQCbFzd0BRS/BV/8fgtvm3gSgtSt5AeRC4hKvVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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