Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2389e03a7df9601a7d5a0920055e6b22aa90f148cf08c2add03764ee0c9fd363' 
  AND token = 'CJV9Eup5MCdhi0qqkk/WbtFogVQySZ4KKx0mBXjmEOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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