Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6c9ef2d5da2c60b72f49a02216143cfdf109a1d8f075ba83888812cd454a954' 
  AND token = '5G2sBTOQIw6eJx4M3l3duArLvtLyXYigUP1OmBhydEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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