SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9386e46f833b5dbac287fa5b9d4a8248996b953a2fe5a0ddd7ec24e2983d95ed' 
  AND token = '1hZDvErRhjCHVM73VN2P4vxMFvYGxQeD484KDlJ5u0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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