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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'f8365c2246937add4e9eab488946b017461c4331f1d29875340a73de85fab60d' 
  AND token = 'B0YgNYomy5t9E5EGdZ9pcXbkQLkqNlKuT7v8EhkqmA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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