Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cc61bfb107f2eb2308bfac6d4c86896d3b56b10c6a90c2f3001775d6f2d53c6' 
  AND token = 'KzBahC5+ahGRRCCDQz6m/LoIdFBshDJhX/7pOfe9uiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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