Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fefb3218bf4ec48c3402fd5a0461966b4a0a7b10d4c5f40411cfe6fc63aff57' 
  AND token = 'V29ChT7iJerwwjcQg/uqyyuvsA0NOFPVlLE/41BiCe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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