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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069d41e0cb50dd71c3751219dc43e8c86cc7b4c3617efd4f9c4b4205fd8bbcfb' 
  AND token = 'FCA9Dfj26A2bboBElHxTWytxvYQMdz1wg0p6TgpirTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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