Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8624dbe39dbd7c198a0feeb01c1a353f8e3f2933e9d2e5a250f34d3cb0994c1c' 
  AND token = 'tW2UkQqryyebwa1FyJ2Jbx//2nRjIhrBLZF2WvZ0Ulw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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