Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'bccc98c47da5dfe128a3acaefb373f7fa1935331250315fa9e87b49a4e9cd4f9' 
  AND token = 'msM70RYMQ3YvepMy7s0OW8+vajJEg9SWaC/R5eQlg2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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