Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1778b55430ffd267474bb4a269ce7c923a941b7b33792f95dd47ba28319744ea' 
  AND token = 'E0U8It3fDIcovOJ62ioAAUW+3lLUiAP4FkcsQni6qOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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