SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1fddc661911bb104ffa3b7ca3cce52f8358f24b2c73b6d0009d4a1266fda11d' 
  AND token = '9KPDhZ1RHJNgYgBDTvR8hoP6dp5opGo6maT+jaPi2/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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