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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad47414795b68ab4fa75ef572c93ef41a59f5c1fa5cbb12acbe35144780ad556' 
  AND token = 'HLpDl0sNPq8IXDjT41Y9Tw0Qt6FYLcU+lse+YtaSZrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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