Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a75635c76144448516b509e70d9b005fbefe654ff2efe035c83a785a0757c4' 
  AND token = 'F4KXebRXCyRY924DOl9zjEEMJpfL4yZl0/9ilhqmXEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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