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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f70a7b67cef2c7fdd5d8a7eb81ee179ec7fcbacae41b94581e4c5dae7235ff36' 
  AND token = '8+u4Uf4i99FngpIJufwgIxmlcTDQscOaeWyK55W4HYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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