Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c93a6c2b685c4cec119c7402ce0c7c9067f1615f33f775bc788801c794b0a212' 
  AND token = '2G3FaLyFpC7k0vVGSMVkUmSeeS1H3THlQIeQbFtLWdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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