Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '315d9135823e6e6ae547cb45740335002850bfbc60d38ab8db411455934197e6' 
  AND token = 'uTyxjhn6h1ta10UGLZA8FXT1DmnZkG32ka3HNHX8L3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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