SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f30756fa70efe5a4de7cd71f1f7328fcbcabfaddd240330b519ab3c6295a8117' 
  AND token = 'ZBkxuTtwVk7ek98Cb9Wc/KgBzCsadYPfosbGvjA2J+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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