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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd36166b4f0d525466d5a4ba286afcd1da56af5f5f53f596ac7eddf70dc46fcac' 
  AND token = '/neX4OSN/wdU5LGra4r86KdUVSTlj0K8jaDwIgWvqOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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