Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff494d1a2a3785c0378f9d3a105289813914007124acafc54bb1ccb2fd84a9d2' 
  AND token = 'XegPt2R0yhqj5GlF8aGaTSq4YjXp/tqDZmWlHTOUyso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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