Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dff5d57aae811d1d6a86c8a3718faa997a587ab3f53817686a1e37058f4f8d17' 
  AND token = 'BxYX715aIXkcZwSJNFTGkch3ZkI5EMCUCAovq62MvXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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