Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34ada0fbad26fd85dd4ba578cadd06c0ff68921daa04bd77da71a030be06d4ca' 
  AND token = '9Cxbh1RbnxXNZ9l8Dstfy4nVZrVnnfEwmRJmHAZOLJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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