Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af1a35f03afd33863846bd31e34ba74f728f55ebbe684046464ec68e359f4cd3' 
  AND token = 'EBhbeBszllpRfISX2VfAV0ZatmWoznzYXBIPFWMUFJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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