Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08a24aae9a66863c3eb3a28e613a8d443208d9064e949918d007e49ddacc7ac4' 
  AND token = 'TjFnEb4nFQ3/he4eQf05j+7h19nalJD+rv+UKy5zqRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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