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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c269606e039d4f175269f63026b54c1c96ca12825b491448650773f07dec0071' 
  AND token = 'kfDtyPr2m/NAASYnBoa7vbP9GMU1oN/OpZuE2PTK008=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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