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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eb5e6cc5e405a1e5ad8fae4ab02a81955c2638ece25a21f5f0c44a00a733402' 
  AND token = 'wV+/dN5iY6IlL4mo1D3l1gpk99C/k1YST60z7aj9YFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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