Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3dea12cb9386a7e309c7e5800379877aa939a1de7f14dbe3d2e14830eba4117e' 
  AND token = 'EmTN3tmEcPBWfRu41B8ElA5OQprodO8gJiNM5S99BhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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