SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '965629901632c07b1a1b508e0ad29db0185e9653f3dd6f6d8b7ed66d0cfc092e' 
  AND token = 'Xjn/JSgqrxIn/5CWvavD+yxZo9c1+/K1X7UqaV/BvVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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