SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72491f21aa4cdcc8665f054322f6b460e4aea2b9256b394ee32c3eec327baa8e' 
  AND token = 'siweVqB01LJ/gOlHQhZ8XCb07LxLXxvkWN8LvSqFq70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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