Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94a21c8f292cdd32459b69050f3312beeef018ac25d27a44995303ddf7dcf22b' 
  AND token = 'YKKIoAlISaYP60dtJS60ubfgnx+oK0wwsETwN2opSsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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