Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0d1c4f1402e8e7824a9072b2b4d1e239a2ada73063d8ac72c27fa54cfe59e74' 
  AND token = 'Vz4X2SnwatPakEDE2SQO8lBpwCYHjEvaKiWQXqHcznM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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