Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c4e36c76494f8f5d02fdafc86935455543200bbe1f78599a361b06f636b1f140' 
  AND token = 'u0GuynWR8IU8QsT1i72VeBWRzkyD9VTuTeTtnqVfKN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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