Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7e4e0dcf1e7875ec0636ada8f558d3e665d0d9423510e8c9011faf7a604302c8' 
  AND token = 'Oaxi39DpWFfapfrDzDXkgCXf4nawvr8nrMxWNqO3/fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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