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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dab48092d6dc3f4acec1361875565182964b07d5a637434c11718c29e64f696' 
  AND token = 'DUMyAFUpGwQNPGkXfc4pqDw8IqEtdvSy7K3a9tR871w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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