Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21e2ba47d17990d2778ef92707e0f2b8cdc7407e4d3e5eedbc8c9a181e9e111a' 
  AND token = 'vqMz2nok0T+LOo55x7Mo/VP8H4IYLWQO/NGCPu876To=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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