Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7f2e6b715941bf51eb1c87c5628259aca8a4712bf621a137d7579f104c1a87e' 
  AND token = 'htE6Ag1dlfXE6jwOlqnt4bKA1Z/THri/yZs0sRKWVpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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