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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '004806bd5b1ac494f496acfd71ac0d6da7a7f469734075b2fd753f513506047f' 
  AND token = 'PzHUVqiw9hEJBt0rq4a9C3wEyko0P46PDm7G6ZvpzvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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