Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f5e2b413872781565c1d37ec35d8c6873f0a230fbb85f32ddd07f6546f9f2ded' 
  AND token = 'rt6ZKWw0oQtAL1L79Oc66BbQJE26HJsub23ERLSSnXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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