Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b6540d8cc89a1c7b40c95aab9474c33824d0558c648b09e2c6bf60f1ffa9b6c5' 
  AND token = '364hJuHanXftYuHl6GdXG+1Nm0CAsBmBdP07bn0aOYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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