Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '332b5248ddafa4132df4a91ad55dff103e493d4d95bb34b72b00e122c9212fe9' 
  AND token = '07l5ji5U7DgdYCQfvxwuxQh9jHGW9nlqw7dTA/7efRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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