SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32dd28c921d972c689574f621c1b7a74d62873cf189c6bab1d194cee3667cbb5' 
  AND token = 'yBzRsz6s9gGrvND/2DMD0kU2+KJG+/ZsTtjyp/VKH6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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