Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5d55a731eb97e43680c81f40917ceee7b086cb282a8564406fd299b9d3aebdc' 
  AND token = 'ra4elZDBk97CCYpo908GpX9ke5VSp2S8ZsdB9Zt0Rz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}