Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b073f17a894bc371b3368ff24f6eb72774212bb04b92a8d74097380fce713646' 
  AND token = 'cuc0xAXaiElIe1BYSUE5D9JBLgJj1rV4nHyHnSO/xpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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