Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f155a838615a8fe8776ddbdcb54912b94c0feb1eeb1264846be4f04761b40c2b' 
  AND token = 'jV8PyCITFmL10y3WaH6y4NfAZm1If20T53M8bTeEoFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}