Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81dbd6915f4cc00be1f30fced0601b848056444f3e91e6b19ed32561afba0f84' 
  AND token = 'J66zsucWS0p4ivOjnA8VhAfH1pHLbRsqgOIIIfuxsOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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