Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '724c5293f6c0efbc6671357048c50acd440f9bf7788e77b1835f44501beb6569' 
  AND token = 'aR7+N8zMNS5UamS6GYTrDtzwVk4ya87LmIKQVOdlGFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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