Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1914b844ec2ed921bb3f78b0b9c40a1515f214810a8c6416bd1abc864b0aa2f' 
  AND token = 'xdg4j02XaMsg+LlKPDzdXuFAV/s9fJV351a/mpDzCmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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