Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '976e24d95895697d86b022366ebb386f34400eebe4bc0e3184c06ea4dba6d42a' 
  AND token = 'zJvUiMA+/nAyMsnT5n52gdx2zCV85Un1xREO4WXUBmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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