Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e34dbd29c32ac5ac168a3004974ca4a793b3d73367c5c6c81b259389ff0264fa' 
  AND token = '92amZ8OW6Ro23Jb7tVfuectdTXL/jc3b9Wc5fTEhYC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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