SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2af10295463b577afc16d3b96fd3fa16cd34572d1d6dc2bc656b9338c8f96843' 
  AND token = '+kyMFEGspXT4pmPaPMnhuRhYFlpF8zy5JlN3kOKA2QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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