Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '45ed9342aad6be9a89b944581beb059186cad5366e59bb60c359384ac74aba34' 
  AND token = 'uQ6N4n+XfzhPqPnSlUrrbbS7wL3uIu7gSzvQCBziJD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00082

JSON explain

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