Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9691e38107d816a1fdf142d0ba798def983aea3e52f4b9481f3a7babba2cccd0' 
  AND token = '/VCSpnEC2h1Y9syx368XaiEVPqpAYpeQS7zJ/gObwrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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