Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cf0b5348f12d8595e48a7db7e22f210704295fce5b060d2b5048b6461aa5503' 
  AND token = 'm0eeduio6LZh2E6rTIk4JY2LbusvOjpt/RoEngSVagI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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