Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '179b2fbc2918ced68329fb9fce5c3d87ddc475d7f263934517beff28e3a2ca27' 
  AND token = 'GpolyBzd3PO1TEZW/ncOJPmJQL6JnvMmRDzqJsN/O6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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