Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ab3f0a2678dbd8c977fd47fba5bde784531f9dc21c8215a4d1cf1f2163f8e7f' 
  AND token = 'KCTD26aIgvYypcw/kKoJaabtmvkn6N6BB56yAi6aKbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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