Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f29cb83fda14370bbdfcf9cf3e1320d00f5e0265540f11b1b9dff890c031977' 
  AND token = 'ZhcR6EJEaKfCx1U301G222FdrPM5PVZC6eijY+DjtVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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