Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c48754ab00a61c5a605257c08ca306e28eae1e25ca7eeabdb68810791118e16c' 
  AND token = 'gH9XRgHJGUWHDXWYBNAodXcpucCz+4AoCcguc0tDdZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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