SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ba343bef605b45bb3aafc24ae8a6e4ba1117f00554388b34cf16edf208a85a9' 
  AND token = 'z2gscmQQMFmUvjojZPnVpkaHQY8O4GB+D/p3S215hO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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