Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5709c84d0bdc7799661c3886dee6c37aeb5284276a994cb78b044a984162d4b2' 
  AND token = 'CG6u0I0EWNWWkx2VyHQMHsu1jMa9YcaJdAo4epkEeTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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