Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5b48411732b75f1b333157bf8b5be8a64a77a112919444a2b7e82928ea3693f0' 
  AND token = 'KSKiKLt5les5O0jUBYchc3QOq/bckGRpwriDtksmNwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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