Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecf2e6323dda7f0a839cd6f0b5d3fe0bb22d580ff937a111fc1fe7344cfa2c9f' 
  AND token = '6bWs/VSKalVPlX/XTwjQUdfuQM3N/O1lXcK1fKFSOIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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