Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a3751e1218c459ceabb075ce20387176ef071e3002fc1fda5e7e3a575d565d7' 
  AND token = 'FMquexU+sS7N+LdO3ZxmDBonUwoTc6rAS2wMiLldY+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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